Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/3620
Conflicts Second World War
Themes Military Intelligence and Operations, Foreign Policy and International Relations
Regions Atlantic, East Asia, Europe, Mediterranean
Countries Belgium, France, Germany, Great Britain, Holland, Japan, Korea, Netherlands, Poland, Portugal, Romania, Singapore, Soviet Union, Spain
Document Type Signals Intelligence
Organisations Foreign Office, Security Service, Government Code and Cypher School
People Edward Bridges, Archibald Clark Kerr, Adolf Hitler, Desmond Morton, Franklin Delano Roosevelt


A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following reports on Western Europe: of Army Group B's intentions for March 19, reported on March 18; that the Commander in Chief (C-in-C) for the West orders that mobilization measures are to be put into effect against enemy airborne landings in the Rhine area on March 18; that Hitler orders thinning out and evacuation measures to be carried out in threatened areas in the west, on March 17; and an Oberkommando der Wehrmacht (OKW) appreciation of the location and intentions of Allied airborne forces, on March 16; Naval Headlines; from the Foreign Ministry in Paris, regarding the Yalta Conference, on March 14; and on the entry of France to the commission of war reparations, on March 13; from the French ambassador in Moscow, noting Soviet care for Allied solidarity, on March 9; on the work of Molotov's commission in Poland, on March 14; and on secret decisions made at the Yalta Conference, on March 13; from the Ministry of Foreign Affairs in Berlin, German propaganda directives, on March 14 and 16; and a Secret Intelligence Service (SIS) report on unrest in Berlin, on March 19.


German strategy, Western Front, defence, counter-attacks, Crossing of the Rhine, contingency planning, mobilisation, Allied powers, military operations, paratroopers, evacuation, prisoners of war, German withdrawal, predicting enemy intentions, landing places, naval intelligence, German U-boats, military bases, Eastern Front, shipping losses, Pacific War, Japanese navy, convoys, submarines, diplomatic intelligence, Yalta Conference, Soviet foreign policy, public statements, territorial concessions, civil unrest, Home Front

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